Improvement in grain-separators



F. 10 H N S0 N. Grain-Separators.

Patentedlure 23,1874.

No.l52,291.

0 COCO 0 0 00000 6 00000 OOOCO 0000 00 O 00 O mmey! UNITED STATES PATENTOFFICE.

FRANK JOHNSON, OF FREDERCKSBURG, MISSOUR.

IMPROVEMENT IN GRAIN-SEPARATORS.

Specificaon forming part of Letters PatcntNO. 152,291, dated June 2.3,1874; application filed March 7, 1874.

T0 all whom zt may concern:

Be it known that I, FRANK Jo1mson, of Fredericksburg, in the county ofGasconade and State of Missouri, have invented a new and usefulImprovement in Grain Separator and Cleaner for Thrashers, of which thefol lowing is a speofication:

Figure lis a top view of my improved device, parts being broken away toshow the construction. Fig. 2 is a vertical longitudinal section of thesamo, taken thro ugh the line 30 .70, Fig. 1.

Similar letters of reference indicate corresponding parts.

The invention relates to an in1provement in grain-separating andcleaning attaolnnents for thrashers, as hereinafter described andspecifically indicaced in the clai 1n.

A represents the side boards of the shoe, to the upper forward part ofwhich is at' tached the board B O, upon whioh the straw and grain arereoeived from the thrasher. The upper part B of the receiving-board isstationary, and the lower part 0 may be hinged or pivoted at its upperedge to the said upper part or to the shoe A. The lower edge of thelower part 0 is secured adjustably to the shoe A by bolts D, which passthrough the side boards of the said shoe, and through slotted lugsattached to said hinged board 0. To the adjustable board 0 are attaohedfingers E about three inches apart,

and two feet, more or less, in length, along which the straw slides,while the grain drops through. To the sides of the shoe A below -thefingers E is attached a fran1e, F, to the side edges of the forward endof Whioh are attached, or upon them are formed, short tongues, whiohenter grooves G in the side boards A of the shoe, so that the forwardend of said frame F may be adjusted higher or lower by shifting it fromone to another of said grooves. The rear end of the frame F is supportedby bolts H, which pass through holes in the side boards A of the shoe,and through slots in the rear parts of the side bars of the said frameF. To the side bars of the frame F are attaohed the ends of thecrossslats I, whioh are arranged one inch apart, and the forward edge ofeaoh rear slat onehalf an inoh below the rear edge of the next forWa-rdslat. The slats I are made about half an inch thick and four .incheswide, and to their rear edges are attached wires J, about one-quarter ofan inch apart, and which project about four inches. The forward edges ofthe slats I are made thicker and are beveled ot, or have narrow inclinedplates attached to them, so as to allow the grain to pass throngh, andalso to give the blast of air et proper direction to blow off the chafl.K L is the tailings-board, the lower part L of whioh is sta tionar andfrom its lower and forward edge the tailings drop into the conveyerplaced"beneath, and which is not shown in the drawings. The upper part Kof the tailings-board is hinged at its lower and forward edge to therear edge of the part L, and its rear edge is seeured at any desiredelevation by a long rod, M, which passes through the rear ends of theside boards of the shoe A, and has a head formed upon one end, and ahand-nut screwed upon ts other end. N is the grainboard, the forwardedge of which is hinged or pivoted at the rear edge of the cheat oroookle screen 0, so that its rear edge may have a vertical movement ofabout two inches. The rear part of the cheat and cockle screen 0 iscovered upon its lower side With a plate, P, to carry the small seedsthat pass through said screen 0 over the tailingsoonveyer. Q, is ascreen for separating any heavy substance that the blast of air from thefan cannot re move. R is a eheat or cockle screen, placed beneath therear part of the screen Q, and beloW and in front of which is placed thegrainconveyer, whioh is not shown in the drawings. The sereens Q R areseoured in place by along bolt, S, whioh passes through the lowerforward part of the shoe A, and has a head formed upon one end and ahandnut screwed upon its other end. Tho screens Q R are placed below thefan, so that the blast from said fan ean only strike the soreen 0 andslats I. The soreens O R may be removed and replaced with boards whendesired. The shoe A is supported by four upright sDring-standards, T,which are so formed as to allow the sh0e to have a longitudinal but nolateral movement. To the outer sides of the lower part of the forwardends of the sides of the shoe A are attached the rear ends ofthe springconnecting bars U, the forward ends of which work on short cranks Vformed upon the shaft V, which revolves in bearings in the frame of themachine, and may be driven from the cyl inder or fan shaft, as may beconvenieno.

Hzwing thus described my invention, what I-claim as new, and desire tosecure by Letters Patent, is-

The combination, With shoe A andadjustab1e frame I having sla-ts andwires, as spacified, 01: the adjustable board 0 and fingers E, as shownand described.

FRANK J OHNSON.

VVitnesses:

CAR-LSSES TANNEIH, 0. J OHNSON.

